// shape. The variant type should hold a TensorList.
    auto proto_attr = op.getValue().dyn_cast<TF::TensorProtoAttr>();
    if (!proto_attr) return failure();
    tensorflow::Tensor tensor;
    if (!tensorflow::ConvertToTensor(proto_attr, &tensor).ok())
      return failure();
    if (tensor.dtype() != tensorflow::DT_VARIANT) return failure();
    if (!tensorflow::TensorShapeUtils::IsScalar(tensor.shape()))
      return failure();

      return empty_buffer_;
    }
    const_attribute_to_buffer_map_[attr] = index;
  }

  // TF doesn't currently support 4-bit types (DT_INT4), so we'll run into
  // trouble calling ConvertToTensor(). For now, extract the tensor data from
  // ElementsAttr directly in this and read type from tflite::TensorType instead
  // of tensorflow::DataType.
  auto type = mlir::cast<TensorType>(value.getType());